Grate stacker



FIG. 1 is a plan view of an grate stacker according to the invention; and

FIG. 2 is a left side view of the grate stacker of FIG. 1; and

FIG. 3 is a front view of the grate stacker of FIG. 1; and

FIG. 4 is a bottom view of the grate stacker of FIG. 1; and

FIG. 5 is a back view of the grate stacker of FIG. 1; and

FIG. 6 is a right side view of the grate stacker of FIG. 1; and

FIG. 7 is a first top perspective view of the grate stacker of FIG. 1; and

FIG. 8 is a second top perspective view of the grate stacker of FIG. 1; and

FIG. 9 is a third top perspective view of the grate stacker of FIG. 1; and

FIG. 10 is a fourth top perspective view of the grate stacker of FIG. 1; and

FIG. 11 is a first bottom perspective view of the grate stacker of FIG. 1; and

FIG. 12 is a second bottom perspective view of the grate stacker of FIG. 1; and

FIG. 13 is a third bottom perspective view of the grate stacker of FIG. 1; and,

FIG. 14 is a fourth bottom perspective view of the grate stacker of FIG. 1. 

CLAIM The ornamental design for a grate stacker, as shown and described. 